LibWeb: Implement :any-link and :local-link pseudo-class selectors

`:any-link` matches links, whether they have been visited or not.

`:local-link` matches links to the current URL.

Tests/LibWeb/Ref/css-any-link-selector-ref.html

@@ -0,0 +1 @@
+<a href="example.com" style="color: orange">Link</a>

Tests/LibWeb/Ref/css-any-link-selector.html

@@ -0,0 +1,6 @@
+<style>
+    :any-link {
+        color: orange;
+    }
+</style>
+<a href="example.com">Link</a>

Tests/LibWeb/Ref/css-local-link-selector-ref.html

@@ -0,0 +1,2 @@
+<a href="" style="color: orange">Local</a>
+<a href="example.com">Not local</a>

Tests/LibWeb/Ref/css-local-link-selector.html

@@ -0,0 +1,7 @@
+<style>
+    :local-link {
+        color: orange;
+    }
+</style>
+<a href="">Local</a>
+<a href="example.com">Not local</a>

Tests/LibWeb/Ref/manifest.json

@@ -5,8 +5,10 @@
     "square-flex.html": "square-ref.html",
     "separate-borders-inline-table.html": "separate-borders-ref.html",
     "opacity-stacking.html": "opacity-stacking-ref.html",
+    "css-any-link-selector.html": "css-any-link-selector-ref.html",
     "css-gradient-currentcolor.html": "css-gradient-currentcolor-ref.html",
     "css-lang-selector.html": "css-lang-selector-ref.html",
+    "css-local-link-selector.html": "css-local-link-selector-ref.html",
     "css-gradients.html": "css-gradients-ref.html",
     "svg-symbol.html": "svg-symbol-ref.html",
     "svg-gradient-spreadMethod.html": "svg-gradient-spreadMethod-ref.html",